good summary of all the relevant data and studies for the last 50 years: https://www.amazon.com/Know-Debunking-Myths-about-Intelligence/dp/1108493343 https://w

good summary of all the relevant data and studies for the last 50 years: https://www.amazon.com/Know-Debunking-Myths-about-Intelligence/dp/1108493343 https://www.amazon.com/Know-Debunking-Myths-about-Intelligen...